Gray Fungus On Roof

Asphalt roof shingle defects.

Gray fungus on roof.

Mold or mildew makes black ugly streaks on a roof. Light grey pink or black. The opposite is true for roof leaks pipe leaks etc. A visual inspection of the backside of the ceiling is the only way to properly identify the extent of the mold growth.

Liquid based ceiling mold. This includes roofs that don t have proper drainage systems in place. Here we discuss the causes of algae moss lichens or fungal growth on roof shingles the effects of these conditions and how to cure or prevent them. Identifying removing preventing algae fungus lichens moss on roof shingles.

You ll want to remove mold from the outside of your house on siding or on your deck as soon as possible. The last one we will discuss is mildew which like mold is very dangerous if left to fester and grow. It doesn t trap as much water against the surface of the roof as moss but it can be acidic and has strands that can penetrate into the shingles. Mold on in attics and attic surfaces roof sheathing the photographs below illustrate mold growth on plywood roof sheathing.

In the vast majority of cases the mold growth is caused by condensation. When it rains a slight amount of zinc dissolves from the strips and coats the roof inhibiting algae and fungus growth. If you wish to prevent reoccurrence of fungus think zinc. It s a combination of algae and fungus and usually has a light mint green color.

From your description you may have lichen growing on the surface of your roof. External mold can do significant damage to exterior surfaces over time eating away at wood stucco and other materials. Far more mold growth may be present on the backside of the sheet rock than the side facing the room. Not only is it unattractive it can actually shorten the life of your shingles so you really should get rid of it.

Zinc strips left have been used for many years as an algae preventative. The mold itself may have a cottony texture but can also be velvety. Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green. These are probably not good things for.

External mold is just as serious as mold inside the home. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Unlike its fungi counterparts mildew spreads extremely fast in warm and wet places. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

Photos and text guide diagnosis of asphalt roof failures how to identify and explain roof shingle failures obtain claims.